Supplement stacks / Birth Control + St Johns Wort
Can You Take Birth Control with St Johns Wort?
Birth Control and St Johns Wort: one interaction flagged, scored 3/10 (high risk). The count and score come from an AI-written analysis checked against our interaction rules, which can only make it stricter. Not medical advice.
Safety at a glance
This score comes from an AI-written analysis of the pair. Our interaction rules check it and can only make it stricter, never milder. Informational only: it can't account for your medications, conditions, or genetics.
What the AI-written analysis says
St. John's Wort is known to interact with various medications, including hormonal contraceptives, potentially reducing their effectiveness. Caution is advised when considering the use of St. John's Wort alongside birth control. Consultation with a healthcare provider is essential to evaluate individual circumstances and potential risks.
Birth Control is a prescription medication. This page describes publicly documented interactions — it can't see your dose, your other prescriptions, or your labs. Discuss any supplement with the prescriber or pharmacist who manages this medication before combining.
Known interactions
Suggestion: Consult healthcare provider before use.
Birth Control
From the AI-written analysis.
Generally safe when used as directed; potential side effects include nausea, headaches, and mood changes.
Typical dosage: As prescribed or as directed on the label
- Nausea
- Headaches
- Mood changes
- Breast tenderness
- Consult healthcare provider if experiencing severe side effects or if considering additional supplements.
St. John's Wort
From the AI-written analysis.
Generally considered safe for short-term use; however, it can cause photosensitivity and may interact with various medications.
Typical dosage: 300-900 mg daily, divided into doses
- Gastrointestinal upset
- Fatigue
- Dry mouth
- Dizziness
- May reduce the effectiveness of hormonal contraceptives; consult healthcare provider before use.
Timing
No timing arrangement makes this combination safe — see the warnings above.
Recommendations
- Consult with a healthcare provider before starting St. John's Wort while on birth control.
Watch out for
- St. Johns Wort induces the liver enzymes (CYP3A4) that clear the estrogen and progestin in hormonal birth control. Clinical studies show faster hormone clearance and more breakthrough bleeding, and health authorities warn that contraceptive protection can be reduced — unintended pregnancies have been reported with this combination. Talk with the prescriber or pharmacist before using St. Johns Wort alongside hormonal contraception, and ask about a backup (barrier) method for any period when the two overlap.
- St. John's Wort may decrease the effectiveness of birth control; consider alternative treatments for mood support.
Frequently asked questions
Can you take Birth Control and St Johns Wort together?
Birth Control and St Johns Wort: one interaction flagged, scored 3/10 (high risk). The count and score come from an AI-written analysis checked against our interaction rules, which can only make it stricter. Not medical advice.
What score does the Birth Control and St Johns Wort combination get?
The Birth Control and St Johns Wort combination is scored 3/10 (high risk). The score comes from an AI-written analysis checked against our interaction rules, which can only make it stricter. Not medical advice. Always confirm with a healthcare professional.
When should you take Birth Control and St Johns Wort?
No timing arrangement makes this combination safe — see the warnings above.
What should you watch out for when combining Birth Control and St Johns Wort?
St. Johns Wort induces the liver enzymes (CYP3A4) that clear the estrogen and progestin in hormonal birth control. Clinical studies show faster hormone clearance and more breakthrough bleeding, and health authorities warn that contraceptive protection can be reduced — unintended pregnancies have been reported with this combination. Talk with the prescriber or pharmacist before using St. Johns Wort alongside hormonal contraception, and ask about a backup (barrier) method for any period when the two overlap. St. John's Wort may decrease the effectiveness of birth control; consider alternative treatments for mood support.
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Not medical advice
AI-written analysis generated August 11, 2026, checked by our interaction rules · How our analysis works